linux-kernel - [PATCH 3/6] arch: Define ARCH_HAS_PHYS

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Message-Id: <20181029235206.30060-4-f.fainelli@gmail.com>
Date:   Mon, 29 Oct 2018 16:52:03 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Robin Murphy <robin.murphy@....com>,
        Laura Abbott <labbott@...hat.com>,
        Stefan Agner <stefan@...er.ch>,
        Johannes Weiner <hannes@...xchg.org>,
        Greg Hackmann <ghackmann@...roid.com>,
        Kristina Martsenko <kristina.martsenko@....com>,
        CHANDAN VN <chandan.vn@...sung.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM64 PORT
        (AARCH64 ARCHITECTURE)),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE), rppt@...ux.ibm.com, linux@...linux.org.uk,
        green.hu@...il.com, deanbo422@...il.com, gxt@....edu.cn,
        ard.biesheuvel@...aro.org
Subject: [PATCH 3/6] arch: Define ARCH_HAS_PHYS_INITRD for ARM and Unicore32

Make ARM and Unicore32 select ARCH_HAS_PHYS_INITRD meaning that they do
define phys_initrd_start/phys_initrd_size and make use of it.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 arch/Kconfig           | 7 +++++++
 arch/arm/Kconfig       | 1 +
 arch/unicore32/Kconfig | 1 +
 3 files changed, 9 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index 9d329608913e..0926f8291782 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -865,6 +865,13 @@ config HAVE_ARCH_PREL32_RELOCATIONS
 	  architectures, and don't require runtime relocation on relocatable
 	  kernels.
 
+config ARCH_HAS_PHYS_INITRD
+	bool
+	help
+	  An architecture selects this when it needs to act on the physical
+	  address of the initial ramdisk and allow generic code such as
+	  FDT to populate that address.
+
 source "kernel/gcov/Kconfig"
 
 source "scripts/gcc-plugins/Kconfig"
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e8cd55a5b04c..b87c40701b0e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -11,6 +11,7 @@ config ARM
 	select ARCH_HAS_KCOV
 	select ARCH_HAS_MEMBARRIER_SYNC_CORE
 	select ARCH_HAS_PTE_SPECIAL if ARM_LPAE
+	select ARCH_HAS_PHYS_INITRD
 	select ARCH_HAS_PHYS_TO_DMA
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 0c5111b206bd..28a66ae61dcf 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -2,6 +2,7 @@
 config UNICORE32
 	def_bool y
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
+	select ARCH_HAS_PHYS_INITRD
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
 	select DMA_DIRECT_OPS
-- 
2.17.1